Many challenges has been facing the sugar manufacturing firms over the years.At the same time, there has been a decrease in sugar cane production from 6.7 million tons in 2013 to 6.5 million tons in 2014 as reported in Economic Survey done in 2014. Moreover, despite reporting increased cane delivery in 2015, value addition by the sugar firms remained dismal indicating inefficient firm processes and overall poor performance. This has been influenced by high cost of production and poor consistency in employing modern technology. Its argued that supply chain (SC)s may use the moderator to mitigate on the high cost which in turn can improve firm performance. The objective of the study was toThis study was anchored on social exchange theory.This study used correlation research design. The target population was 300 supply chain employees from the 10 sugar manufacturing firms in western Kenya. A sample size of 169 was drawned using cluster, purposive and simple random sampling. the company’s records. Multiple, regression the test of highest order unconditional interaction revealed that the interaction between electronic data interchange and supplier relationship management had a significant R² change (R² change = 0.0354, p=0.0012). The implication is that supplier relationship moderated the relationship between electronic data interchange integration and supply chain performance in sugar manufacturing firms in western Kenya. The study concluded that supplier relationship management as a moderator has The study recommended that stakeholders should re-utilize the application of the moderator in sugar manufacturing firms

KEYWORDS: Relationship, Manufacturing, Performance, Integration